arch/x86/include/asm/unwind_hints.h

   1 #ifndef _ASM_X86_UNWIND_HINTS_H
   2 #define _ASM_X86_UNWIND_HINTS_H
   3
   4 #include <linux/objtool.h>
   5
   6 #include "orc_types.h"
   7
   8 #ifdef __ASSEMBLY__
   9
  10 .macro UNWIND_HINT_END_OF_STACK
  11         UNWIND_HINT type=UNWIND_HINT_TYPE_END_OF_STACK
  12 .endm
  13
  14 .macro UNWIND_HINT_UNDEFINED
  15         UNWIND_HINT type=UNWIND_HINT_TYPE_UNDEFINED
  16 .endm
  17
  18 .macro UNWIND_HINT_ENTRY
  19         VALIDATE_UNRET_BEGIN
  20         UNWIND_HINT_END_OF_STACK
  21 .endm
  22
  23 .macro UNWIND_HINT_REGS base=%rsp offset=0 indirect=0 extra=1 partial=0 signal=1
  24         .if \base == %rsp
  25                 .if \indirect
  26                         .set sp_reg, ORC_REG_SP_INDIRECT
  27                 .else
  28                         .set sp_reg, ORC_REG_SP
  29                 .endif
  30         .elseif \base == %rbp
  31                 .set sp_reg, ORC_REG_BP
  32         .elseif \base == %rdi
  33                 .set sp_reg, ORC_REG_DI
  34         .elseif \base == %rdx
  35                 .set sp_reg, ORC_REG_DX
  36         .elseif \base == %r10
  37                 .set sp_reg, ORC_REG_R10
  38         .else
  39                 .error "UNWIND_HINT_REGS: bad base register"
  40         .endif
  41
  42         .set sp_offset, \offset
  43
  44         .if \partial
  45                 .set type, UNWIND_HINT_TYPE_REGS_PARTIAL
  46         .elseif \extra == 0
  47                 .set type, UNWIND_HINT_TYPE_REGS_PARTIAL
  48                 .set sp_offset, \offset + (16*8)
  49         .else
  50                 .set type, UNWIND_HINT_TYPE_REGS
  51         .endif
  52
  53         UNWIND_HINT sp_reg=sp_reg sp_offset=sp_offset type=type signal=\signal
  54 .endm
  55
  56 .macro UNWIND_HINT_IRET_REGS base=%rsp offset=0 signal=1
  57         UNWIND_HINT_REGS base=\base offset=\offset partial=1 signal=\signal
  58 .endm
  59
  60 .macro UNWIND_HINT_IRET_ENTRY base=%rsp offset=0 signal=1
  61         VALIDATE_UNRET_BEGIN
  62         UNWIND_HINT_IRET_REGS base=\base offset=\offset signal=\signal
  63 .endm
  64
  65 .macro UNWIND_HINT_FUNC
  66         UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=8 type=UNWIND_HINT_TYPE_FUNC
  67 .endm
  68
  69 .macro UNWIND_HINT_SAVE
  70         UNWIND_HINT type=UNWIND_HINT_TYPE_SAVE
  71 .endm
  72
  73 .macro UNWIND_HINT_RESTORE
  74         UNWIND_HINT type=UNWIND_HINT_TYPE_RESTORE
  75 .endm
  76
  77 #else
  78
  79 #define UNWIND_HINT_FUNC \
  80         UNWIND_HINT(UNWIND_HINT_TYPE_FUNC, ORC_REG_SP, 8, 0)
  81
  82 #endif /* __ASSEMBLY__ */
  83
  84 #endif /* _ASM_X86_UNWIND_HINTS_H */